package com.syt.educenter.controller;


import com.google.gson.Gson;
import com.syt.commonutils.HttpClientUtils;
import com.syt.commonutils.JwtUtils;
import com.syt.educenter.entity.UcenterMember;
import com.syt.educenter.service.UcenterMemberService;
import com.syt.educenter.utils.ConstantWxUtils;
import com.syt.servicebase.exceptionHandler.MyException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;

import java.net.URLEncoder;
import java.util.HashMap;

@Controller
//@CrossOrigin
@RequestMapping("/api/ucenter/wx")
public class WxApiController {
    @Autowired
    private UcenterMemberService memberService;

    //2.获取扫描人信息,添加数据
    @GetMapping("callback")
    public String callBack(String code,String state){
        try {
            //1.获取code值,临时票据,类似于验证码
            //2.拿着code请求微信的固定地址,得到两个值accsess_token 和 openid
            String baseAccessTokenUrl = "https://api.weixin.qq.com/sns/oauth2/access_token" +
                    "?appid=%s" +
                    "&secret=%s" +
                    "&code=%s" +
                    "&grant_type=authorization_code";
            //拼接三个参数 ：id  秘钥 和 code值
            String accessTokenUrl = String.format(
                    baseAccessTokenUrl,
                    ConstantWxUtils.WX_OPEN_APP_ID,
                    ConstantWxUtils.WX_OPEN_APP_SECRET,
                    code
            );
            //请求这个拼接好的地址,得到返返回的两个值,access_token 和 openid
            //使用HttpClient发送请求,得到返回结果
            String accseeTokenInfo = HttpClientUtils.get(accessTokenUrl);
            //从accseeTokenInfo字符获取 access_token和openid
            //把accseeTokenInfo转换成map集合,根据map里面key获取对应值
            Gson gson=new Gson();
            HashMap mapAccessToken = gson.fromJson(accseeTokenInfo, HashMap.class);
            String accessToken = (String) mapAccessToken.get("access_token");
            String openid = (String) mapAccessToken.get("openid");

            //把扫描人信息添加数据库里面
            //判断数据表里面是否存在相同微信信息，根据openid判断
            UcenterMember member = memberService.getOpenIdMember(openid);
            if(member == null) {//memeber是空，表没有相同微信数据，进行添加
                //3 拿着得到accsess_token 和 openid，再去请求微信提供固定的地址，获取到扫描人信息
                //访问微信的资源服务器，获取用户信息
                String baseUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo" +
                        "?access_token=%s" +
                        "&openid=%s";
                //拼接两个参数
                String userInfoUrl = String.format(
                        baseUserInfoUrl,
                        accessToken,
                        openid
                );
                //发送请求
                String userInfo = HttpClientUtils.get(userInfoUrl);
                //获取返回的userInfo字符串扫描人信息
                HashMap userInfoMap = gson.fromJson(userInfo, HashMap.class);
                String nickname = (String) userInfoMap.get("nickname");//昵称
                String headimgurl = (String) userInfoMap.get("headimgurl");//头像

                member = new UcenterMember();
                member.setOpenid(openid);
                member.setNickname(nickname);
                member.setAvatar(headimgurl);
                memberService.save(member);
            }
            //使用jwt根据member对象生成token字符串
            String jwtToken = JwtUtils.getJwtToken(member.getId(), member.getNickname());
            //最后：返回首页面，通过路径传递token字符串
            return "redirect:http://localhost:3000?token="+jwtToken;
        } catch (Exception e) {
            throw new MyException(20001,"登陆失败");
        }
    }

    //1.生成微信扫描二维码
    @GetMapping("login")
    public String getWxCode(){
        //固定地址，后面拼接参数
//        String url = "https://open.weixin.qq.com/" +
//                "connect/qrconnect?appid="+ ConstantWxUtils.WX_OPEN_APP_ID+"&response_type=code";

        // 微信开放平台授权baseUrl  %s相当于?代表占位符
        String baseUrl = "https://open.weixin.qq.com/connect/qrconnect" +
                "?appid=%s" +
                "&redirect_uri=%s" +
                "&response_type=code" +
                "&scope=snsapi_login" +
                "&state=%s" +
                "#wechat_redirect";

        //对redirect_url进行URLEncoder编码
        String redirectUrl = ConstantWxUtils.WX_OPEN_REDIRECT_URL;
        try {
            redirectUrl = URLEncoder.encode(redirectUrl, "utf-8");
        }catch(Exception e) {
        }

        //设置%s里面值
        String url = String.format(baseUrl, ConstantWxUtils.WX_OPEN_APP_ID, redirectUrl, "syt");

        //重定向到请求微信地址里面
        return "redirect:"+url;
    }
}
